Attachment-securing means.



Patented Nov. 21, 1911.

INVENTOR M. G. SWAN. ATTACHMENT sncnnma MEANS. APPLICATION FILED JUNE13, 1910.

Illfllllllllllll 55 COLUMIIA PLANDGRAPN co.. WASHINBTQN, n. c,

ITE @TAES FTENT @FFIQE.

MILTON G. SI/VAN, 0F LANCASTER, PENNSYLVANIA, ASSIGNOR TO STEHMAN ANDSIVAN MANUFACTURING COMPANY, OF LANCASTER,

TION OF PENNSYLVANIA.

PENNSYLVANIA, A CORPORA- ATTACHMENT-SECURING MEANS.

rooaeee.

To all whom it may concern:

Be it known that I, MILTON G. SWAN, a citizen of the United States,residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain new and useful Improvements inAttachment-Securing Means, of which the following is a specification,reference being had therein to the accompanying drawing.

My invention relates to an adjustable attaching means whereby workholding attaclnnents may be attached to any of the several styles ofengravers blocks, without having been especially made for thatparticular style of block, thus rendering said work holding clamps orattachments universal.

The jaws of engravers blocks are all formed with a plurality of holes inthe upper surface of the jaw for the reception of the usual retainingclamps and pins for holding work, but it has been found that the severalstyles of blocks have these holes differently arranged, so that anattachment that depends for its securing means to the block upon pins orstuds extending from its lower surface and engaging the holes in thejaws of the blocks, willbe found to only register with the holes incertain blocks and thus cannot be attached to all styles of blockswithout being especially made therefor. To obviate this differently andmake the attachments universal and adaptable to all styles of blocks, Ihave provided a novel .form of adjustable pin or stud that may have itsposition upon the plate changed within a sufficient scope to registerwith and be engaged by the holes in the jaws of any block.

The objects of the invention are to provide an adjustable means forsecuring work holding attachments upon engraver-s blocks havingjaw-plates with a multiple of holes arranged in various ways.

Vith these and other objects in view my invention consists in certainconstruction and combination of parts as will hereinafter be fullydescribed and claimed, and illustrated in the accompanying drawings,which form a part of this application, and in which like figures ofreference refer to corresponding parts in all of the views; but it isfully understood that while I have here described my invention as hereshown, that Specification of Letters Patent.

Application filed June 13, 1910.

Patented Nov. 21, 1911. Serial No. 566,585.

I do not confine myself to the exact design as shown, as slight changesmay be made in the construction and arrangement of the several partswithout departing from the spirit of the invention.

In the drawings :Figure 1, is a partial elevational view of the head ofan engravers block, embodying my device shown upon one jaw in section.Fig. 2, is a bottom plan view of a work holding attachment, showing theattaching studs in one position. Fig. 3, is a view of the same, showingthe attaching studs in another position. Fig. 4, is a partial detailView of the work holding attachment, taken on the line of Fig. 2. Fig.5, is a detail edge view of the notched nut. Fig. 6, is a plan view ofthe same. Fig. 7 is a detail edge view of the eccentric stud plate andstud. Fig. 8, is a bottom plan view of the same.

Referring to the drawings, 1, indicates the head of the block, which isprovided with the usual sliding aws 2, each of which is shown piercedwith a hole 3, of which there may be a series arranged in an orderrequired in the different makes of blocks.

The work holding member 4, is formed with one or more studs 6,projecting from the lower surface thereof and adjustably arranged sothat they can be set to engage and enter into any of the holes 3, withina limited scope. To accomplish this I have formed the work holdingmember 4, with the circular recess 7, in the lower surface thereof, andwhich recess communicates with the axial screw hole 8, within which isplaced the retaining screw 9. Upon said retaining screw 9, and withinthe recess 7, is placed an eccentric studplate 10, which is providedwith the orifice 11, placed to one side of the center thereof, and thestud 12, which is rigidly secured to said plate 10, and at right anglesthereto. Vithin said recess 7 and upon said stud-plate 10, and retainingin frictional contact the studplate and the extension plate by theretaining screw 9, threaded therein is the nut 13, which is formed withthe notch 14, to accommodate the stud 12. It will thus be readily seenthat by loosening the screw 9, and thus releasing from frictionalengagement the stud plate 10, the stud may be adjusted to any desiredposition within a scope equal to the radius from the center of the screwto the center of the stud-pin which has been formed to cover alldiflerences in the position of the holes in the jaws of differentblocks.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is In a device of the class described, incombination with work holding jaws formed with a recess in the lowersurface thereof, a projecting stud, an eccentric plate secured to saidstud and adapted to be rotated within said recess, a retaining-screwextending through said work holding means and projecting through thecenter of said recess, 15 and a nut formed with a notched edge to engagesaid stud and adapted to be screwthreaded upon said retaining screw forthe purpose of holding said stud-plate and stud within said recess in anormally rigid manner.

In testimony whereof I aifix my signature in presence of two Witnesses.

MILTON G. SWVAN,

Witnesses 7M. J. CoULTnR, MAnuL L. LEFEVRE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

